As
of March 31, 2009, there was $25.3 million of total unrecognized compensation costs related to unvested options and restricted stock awards that the Company expects to
recognize over a weighted average period of approximately 2.6 years.

As
of September 30, 2008, there was $19.7 million of total unrecognized compensation costs related to unvested options and restricted stock awards that the Company expects
to recognize over a weighted average period of approximately 2.4 years.

As
of June 30, 2008, there was $21.2 million of total unrecognized compensation costs related to unvested options and restricted stock awards that the Company expects to
recognize over a weighted average period of approximately 2.5 years.

As
of March 31, 2008, there was $21.6 million of total unrecognized compensation costs related to unvested options and restricted stock awards that the Company expects to
recognize over a weighted average period of approximately 2.7 years.

As
of September 30, 2007, there was $15.3 million of total unrecognized compensation costs related to unvested options and restricted stock awards that the Company expects
to recognize over a weighted average period of approximately 2.7 years.

As of June 30, 2007,
there was $17.0 million of total unrecognized compensation costs related
to unvested options and restricted stock awards that the Company expects to
recognize over a weighted average period of approximately 2.5 years.

As of March 31,
2007, there was $18.5 million of total unrecognized compensation costs
related to unvested options and restricted stock awards that the Company
expects to recognize over a weighted average period of approximately 2.7 years.